Japanese Ginger Mackerel

Ingredients:
mackerel filets for four
sugar (150 grams)
one ume-boshi (Japanese pickled plum)
one piece of fresh ginger
120 ml of mirin (sweetened sake)
100 ml of sake
150 ml of soy sauce
miso (150 grams)

Preparations:
Mackerel is a tasty fish but it has a bit strong smell too, so the filets of mackerel should be first washed with boiling water (for a few seconds). Then boil the filets in water in a deep frying pan, and carefully remove the scum that forms on top. Remove the water and add the sugar, the ume-boshi, the thinly sliced ginger, the mirin, the sake and the soy sauce and boil till the sauce becomes nice and thick. Finally add the miso (soy paste) and boil for a few more minutes.